{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{2}{c}}
\toprule
                &\multicolumn{1}{c}{Probability of joining the party}&\multicolumn{1}{c}{Probability of joining the campaign}\\
\midrule
                &         &         \\
                &         &         \\
Improved voice  &3.870\sym{***}&3.411\sym{***}\\
                &  (0.797)&  (0.766)\\
                &         &         \\
 \hline Mean status quo&    28.63&    31.76\\
Number of Observations&      878&      992\\
\bottomrule
\end{tabular}
}
